Device holder



FIG. 1 is a first perspective view of a device holder for an exercise machine showing my new design;

FIG. 2 is a second perspective view of the device holder thereof;

FIG. 3 is a back view of the device holder thereof;

FIG. 4 is a front view of the device holder thereof;

FIG. 5 is a first side view of the device holder thereof;

FIG. 6 is a second side view of the device holder thereof;

FIG. 7 is a bottom view of the device holder thereof;

FIG. 8 is a top view of the device holder thereof; and,

FIG. 9 is a third perspective view of the device holder positioned on an exercise machine.

Elements shown in broken lines show environmental structures of an exercise machine and form no part of the claimed design. 

CLAIM The ornamental design for a device holder, as shown and described. 